# Question #ab539

##### 1 Answer

Jun 13, 2015

#### Explanation:

The motion is a decelerated motion, so we can find the deceleration.

The two laws of the accelerated motion are:

and

But if you solve the system of the two equations, you can find a third law really useful in those cases in which you haven't the time, or you haven't to find it.

So:

so the resistence would be: